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Document os support of each collector

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This commit is contained in:
Tobias Schmidt 2016-01-21 18:09:24 -05:00
commit e2163db0f7
6 changed files with 50 additions and 47 deletions
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collector/ipvs_linux_test.go Normal file
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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collector
import (
"flag"
"io/ioutil"
"net"
"net/http"
"net/http/httptest"
"strconv"
"strings"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs"
)
var (
expectedIPVSStats = procfs.IPVSStats{
Connections: 23765872,
IncomingPackets: 3811989221,
OutgoingPackets: 0,
IncomingBytes: 89991519156915,
OutgoingBytes: 0,
}
expectedIPVSBackendStatuses = []procfs.IPVSBackendStatus{
{
LocalAddress: net.ParseIP("192.168.0.22"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.82.22"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 248,
InactConn: 2,
},
{
LocalAddress: net.ParseIP("192.168.0.22"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.83.24"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 248,
InactConn: 2,
},
{
LocalAddress: net.ParseIP("192.168.0.22"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.83.21"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 248,
InactConn: 1,
},
{
LocalAddress: net.ParseIP("192.168.0.57"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.84.22"),
RemotePort: 3306,
Proto: "TCP",
Weight: 0,
ActiveConn: 0,
InactConn: 0,
},
{
LocalAddress: net.ParseIP("192.168.0.57"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.82.21"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 1499,
InactConn: 0,
},
{
LocalAddress: net.ParseIP("192.168.0.57"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.50.21"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 1498,
InactConn: 0,
},
{
LocalAddress: net.ParseIP("192.168.0.55"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.50.26"),
RemotePort: 3306,
Proto: "TCP",
Weight: 0,
ActiveConn: 0,
InactConn: 0,
},
{
LocalAddress: net.ParseIP("192.168.0.55"),
LocalPort: 3306,
RemoteAddress: net.ParseIP("192.168.49.32"),
RemotePort: 3306,
Proto: "TCP",
Weight: 100,
ActiveConn: 0,
InactConn: 0,
},
}
)
func TestIPVSCollector(t *testing.T) {
if err := flag.Set("collector.procfs", "fixtures/proc"); err != nil {
t.Fatal(err)
}
collector, err := newIPVSCollector()
if err != nil {
t.Fatal(err)
}
sink := make(chan prometheus.Metric)
go func() {
for {
<-sink
}
}()
err = collector.Update(sink)
if err != nil {
t.Fatal(err)
}
for _, expect := range expectedIPVSBackendStatuses {
labels := prometheus.Labels{
"local_address": expect.LocalAddress.String(),
"local_port": strconv.FormatUint(uint64(expect.LocalPort), 10),
"remote_address": expect.RemoteAddress.String(),
"remote_port": strconv.FormatUint(uint64(expect.RemotePort), 10),
"proto": expect.Proto,
}
// TODO: Pending prometheus/client_golang#58, check the actual numbers
_, err = collector.backendConnectionsActive.GetMetricWith(labels)
if err != nil {
t.Errorf("Missing active connections metric for label combination: %+v", labels)
}
_, err = collector.backendConnectionsInact.GetMetricWith(labels)
if err != nil {
t.Errorf("Missing inactive connections metric for label combination: %+v", labels)
}
_, err = collector.backendWeight.GetMetricWith(labels)
if err != nil {
t.Errorf("Missing weight metric for label combination: %+v", labels)
}
}
}
// mock collector
type miniCollector struct {
c Collector
}
func (c miniCollector) Collect(ch chan<- prometheus.Metric) {
c.c.Update(ch)
}
func (c miniCollector) Describe(ch chan<- *prometheus.Desc) {
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "fake",
Subsystem: "fake",
Name: "fake",
Help: "fake",
}).Describe(ch)
}
func TestIPVSCollectorResponse(t *testing.T) {
if err := flag.Set("collector.procfs", "fixtures/proc"); err != nil {
t.Fatal(err)
}
collector, err := NewIPVSCollector()
if err != nil {
t.Fatal(err)
}
prometheus.MustRegister(miniCollector{c: collector})
rw := httptest.NewRecorder()
prometheus.Handler().ServeHTTP(rw, &http.Request{})
metricsFile := "fixtures/ip_vs_result.txt"
wantMetrics, err := ioutil.ReadFile(metricsFile)
if err != nil {
t.Fatalf("unable to read input test file %s: %s", metricsFile, err)
}
wantLines := strings.Split(string(wantMetrics), "\n")
gotLines := strings.Split(string(rw.Body.String()), "\n")
gotLinesIdx := 0
// Until the Prometheus Go client library offers better testability
// (https://github.com/prometheus/client_golang/issues/58), we simply compare
// verbatim text-format metrics outputs, but ignore any lines we don't have
// in the fixture. Put differently, we are only testing that each line from
// the fixture is present, in the order given.
wantLoop:
for _, want := range wantLines {
for _, got := range gotLines[gotLinesIdx:] {
if want == got {
// this is a line we are interested in, and it is correct
continue wantLoop
} else {
gotLinesIdx++
}
}
// if this point is reached, the line we want was missing
t.Fatalf("Missing expected output line(s), first missing line is %s", want)
}
}